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/* Toneme brand, paired means and logo-based chart annotations. */
:root{--ink:#17383c;--muted:#526d70;--paper:#fafcfc;--line:#cfe3e4;--astra:#007f86;--qwen:#2637ed}
[hidden]{display:none!important}
.chart-frame{background:#fcfefe}.chart-controls{display:flex;gap:14px;align-items:center;flex-wrap:wrap}.chart-controls label{display:flex;align-items:center;gap:7px}.chart-controls select{max-width:235px;font-size:11px}.chart-controls #chart-task{max-width:210px}
.model-logo,.qwen-icon{width:22px;height:22px;flex-shrink:0;display:inline-block;vertical-align:middle}.qwen-icon{overflow:hidden;position:relative}.qwen-icon img{display:block;height:22px;width:82.5px;max-width:none}
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.legend{font-size:11px;padding-bottom:16px}.legend .meta{margin-left:auto;font-size:10px}
#chart-summary{padding:0 24px 12px}.mean-heading{display:flex;justify-content:space-between;align-items:center;gap:16px;border-top:1px solid var(--line);padding:12px 0 8px;color:var(--muted);font-size:10px}.mean-heading strong{font-size:12px;font-weight:500;color:var(--ink)}
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svg .axis{stroke:#cadcdd;stroke-width:.65;shape-rendering:crispEdges}svg .paired{stroke:#9ab9bd;stroke-width:1;stroke-dasharray:4 5;transition:opacity .2s,stroke .2s}svg .point{transition:opacity .2s}.dimmed{opacity:.14}.paired.active-pair{stroke:#426e74;stroke-width:1.5}
.plot-case-key{display:flex;gap:6px 12px;flex-wrap:wrap;padding:5px 30px 16px}.plot-case-key button{border:0;border-bottom:1px solid var(--line);background:transparent;font:10px/1.8 var(--font-mono);padding:4px 6px}.plot-case-key span{color:var(--muted);margin-left:9px}.time-pair{padding:18px 0;border-top:1px solid #e3eded}.time-pair>p{margin-bottom:6px}.compact-plot{background-image:radial-gradient(#b8cece55 .65px,transparent .65px);background-size:10px 10px}
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/* One hover language across every interactive row, control and analysis panel. */
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nav a:hover,button:hover,select:hover,input:hover,summary:hover{background-color:#eaf4f4}
a{transition:background-color .22s,color .22s}a:hover{background-color:#eaf4f4}
.model-mean,.findings article,.methods-grid article,.trace-facts article,.duration-row,.sequence-row,.time-pair{position:relative;isolation:isolate}
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@media(min-width:1600px){.masthead,main{max-width:1120px;padding:0 64px}}
@media(max-width:800px){.model-mean{grid-template-columns:190px 1fr 80px 110px;gap:12px}.model-mean:has(.time){grid-template-columns:190px 1fr 110px}.frame-head{flex-wrap:wrap;gap:12px}.chart-controls{margin:0}.brand span{display:none}.mean-score strong{font-size:21px}}
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@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;scroll-behavior:auto!important}}

.mean-pair{stroke:#87b0b2;stroke-width:1.1}.mean-logo-tile{fill:#f0f8f7;stroke:#75b0b3;stroke-width:1}.qwen .mean-logo-tile{fill:#eff0ff;stroke:#a6aff2}.mean-mark-label{fill:currentColor;paint-order:stroke;stroke:#fcfefe;stroke-width:4px;stroke-linejoin:round;font-size:11px}.mean-mark{outline:none;transition:opacity .2s}.mean-mark:focus .mean-logo-tile,.mean-mark:hover .mean-logo-tile{stroke:currentColor;stroke-width:2}.point.active-pair .task-dot,.point:focus .task-dot{r:6;stroke:currentColor;stroke-width:2}.task-dot{transition:r .18s,stroke .18s}#scatter:has(.active-pair) .mean-mark,#scatter:has(.active-pair) .mean-pair{opacity:.3}

/* Revision 3: visible task points, explicit mean labels and evidence-led summary. */
.mean-leader{stroke:currentColor;stroke-width:.8;opacity:.65;pointer-events:none}.mean-anchor{fill:none;stroke:currentColor;stroke-width:1;pointer-events:none}.mean-mark-value{fill:currentColor;font:11px var(--font-mono);paint-order:stroke;stroke:#fcfefe;stroke-width:4px;stroke-linejoin:round}.mean-mark-label{font-size:10px}.mean-mark .mean-logo-tile{fill:#f0f8f7}.mean-mark.qwen .mean-logo-tile{fill:#eff0ff}
.research-summary{border-top:1px solid var(--line);padding-top:28px;margin-top:32px;scroll-margin-top:28px}.research-summary .section-head{margin-bottom:12px}.summary-intro,.summary-note{color:var(--muted);font-size:12px;line-height:1.9}.summary-intro{max-width:850px;margin-bottom:24px}.takeaway-labels,.takeaway{display:grid;grid-template-columns:170px 1fr 1fr;gap:24px}.takeaway-labels{font-size:10px;color:var(--muted);padding:10px 0;border-bottom:1px solid var(--line)}.takeaway{padding:22px 0;border-bottom:1px solid var(--line);font-size:12px;line-height:1.9;position:relative;isolation:isolate}.takeaway h3{font-size:14px;line-height:1.8;margin:0}.takeaway h3>span{font:11px var(--font-mono);display:block;color:var(--astra);margin-bottom:8px}.takeaway p{margin:0}.takeaway div>p{margin-bottom:10px}.takeaway a,.takeaway .link-button{font-size:11px;color:#006970}.takeaway-links{display:flex;gap:16px;flex-wrap:wrap}.summary-note{padding:18px 0 0;margin:0}.takeaway::before{content:'';position:absolute;inset:0;z-index:-1;pointer-events:none;background:linear-gradient(105deg,rgba(0,127,134,.015),rgba(0,127,134,.065));opacity:0;transition:opacity .24s}.takeaway:hover::before{opacity:1}
@media(max-width:1000px){.takeaway-labels,.takeaway{grid-template-columns:145px 1fr 1fr;gap:18px}nav{gap:13px}}
@media(max-width:650px){.takeaway-labels{display:none}.takeaway{grid-template-columns:1fr;gap:12px;padding:20px 0}.takeaway h3>span{display:inline-block;margin:0 10px 0 0}.takeaway h3{font-size:14px}.takeaway>p:before{content:'建议方向 · ';color:var(--astra);font-weight:500}.research-summary .section-head>.meta{font-size:10px}.summary-intro,.summary-note,.takeaway{font-size:12px}.mean-mark-value{font-size:10px}}

/* Match the Chinese homepage: regular headings, no synthetic weight. */
h1,h2,h3,h4{font-family:var(--font-body);font-weight:400}